Power on Note It is important to have the printer control panel functional as soon as possible in the troubleshooting process so that the printer’s diagnostics can assist in locating printing errors. Table 36. Power on defect or blank display 188 Troubleshooting EN Problem Action The power cord is not plugged into the wall outlet and the printer. Make sure the power cord is firmly plugged into the printer and the outlet. Proper AC power is not available. Measure the voltage at the outlet. If necessary, plug the power cord into another AC circuit outlet. The power switch is off. Set the switch to the on position. You should hear the switch toggle.
If the front right side cover has been removed recently, be sure that the rod leading to the power supply moves as the rocker switch is toggled. If the printer still does not turn on, the power switch might be defective. 1. Remove the engine controller board. 2. Measure the resistance between the two terminals of the power switch (SW1) by applying the tester probes to the terminals. The resistance must be low (under 1 KΩ) when the power is turned on, and high (over 6 MΩ) when the switch is turned off. 3. Replace the engine controller board, if necessary. The overcurrent/ overvoltage detection circuit is activated. Wait for more than two minutes before turning the printer back on.
A fuse is blown. 1. Check the fuses (FU1 and FU2) on the engine controller board. 2. Replace the fuses if necessary.